Did humans, at some point, believe that the universe is 18 billion years old, prior to the 13.8 billion estimate?
Did humans, at some point, believe that the universe is 18 billion years old, prior to the 13.8 billion estimate?
When I was a kid (or perhaps a teenager), I distinctly remember at one point believing the universe was around 18 billion years old, but I can’t remember where my memory would’ve gotten that estimate prior to more modern estimates.